Product Information

Newton Newtonite 801 Sealing Mastic for Sealing Penetration and Preventing Bridging

Stockcode: A18

A multipurpose silicone sealant primarily used with the NewLath 805 Mesh Membrane and Newtonite 803 Membranes - applied to the plug before fixing into the memrbane, 801 Mastic seals the penetration and prevents bridging between the damp substrate and new internal surface.

Applied to the fixing plugs before they are fitted, Newtonite 801 Mastic serves so as to seal the penetration and stop the occurrence of a 'bridge' between the damp or stained substrate and the new internal surface. Newtonite 801 Mastic has a high resistance to both ageing and extremes of temperature, as well as achieving a high adhesive strength, without primer, on the majority of materials used in the building and engineering industries.

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About us

Newton Waterproofing Systems, est 1848, is the UK's leading independent supplier of structural waterproofing systems, including basement waterproofing and pumping products, damp proofing, water control and drainage products.

Our company is a family-owned business with a long history of designing quality waterproofing materials and a passion for providing the best technical advice and support for those who require our assistance.

Our projects range from small and domestic to high-end residential city and country properties, commercial buildings and extensive civil projects. Here at Newton Waterproofing Systems, we pride ourselves on our ability to provide comprehensive technical design, superior materials and expert installation.

Newton Waterproofing provides various applications, both domestic and commercial;

Basement waterproofing, which involves transforming a basement/cellar into a comfortable living space, therefore increasing the property value.

Structural waterproofing, providing a full solution for either brand new builds or renovations and protecting the structure from water ingress.

Deck waterproofing, ensuring that areas such as decks and balconies are completely invulnerable to water ingress as well as meeting the client’s requirements often involving expanding the available space.

Damp floor treatments, supplying a complete range of floor membranes which can be used either as a standalone product or a full below ground waterproofing solution.

Basement pumps, used to manage clear ground water, grey water, effluent or sewage.

Drainage membranes, extracting any ground water from basements while also sustaining walls or rafts.

Ground Gas Waterproofing & Radon Protection, which manages water and gas levels within both below ground and retaining structures through the use of a combined system that involves basement waterproofing, ground gas waterproofing and mitigation.

Damp proofing, which prevents any condensation, rising or penetrating damp within the environment, creating a more comfortable living space for the client.

Concrete waterproofing, which provides a range of products that are used to waterproof both retained structures and covered/uncovered decks.

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Articles/Press Releases

08/03/2024 - Waterproofing vs. Damp Proofing: A Comprehensive Analysis
In the construction industry, the potential for water ingress and water-related issues is a constant and essential consideration.
09/02/2024 - Newton Waterproofing Helps Repair London’s Busy Limehouse Link Tunnel
Newton Waterproofing, a leading supplier and designer of waterproofing solutions for large-scale commercial and infrastructure projects, teamed up with specialist contractor ASF Waterproofing to successfully repair leaks inside the Limehouse Link Tunnel in East London.
15/01/2024 - Waterproofing the Cambridge House Luxury Hotel, London
Newton was proud to contribute to the transformation of the unique, Grade I listed Cambridge House in Piccadilly as it underwent conversion into one of London’s grandest hotels.
11/12/2023 - Looking Back on a Milestone Year
From all of us at Newton Waterproofing, we’d like to wish you a very Merry Christmas!
07/12/2023 - Newton Waterproofing Releases Full List of RIBA CPD Webinars for 2024
Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, has released its list of free, RIBA-approved CPD webinars for 2024.
10/11/2023 - The Leading Experts in High-Profile Listed and Historic Building Waterproofing Projects
When it comes to high-profile waterproofing projects, Newton Waterproofing is the name that stands out.
14/09/2023 - Don’t Miss Newton Waterproofing At The Kent Construction EXPO
Newton Waterproofing will be exhibiting and sponsoring at this year’s Kent Construction EXPO.
25/08/2023 - Newton Waterproofing Up for Impressive Eight Awards
Newton Waterproofing is proud to have made the finals in eight award categories in the past month.
10/07/2023 - Newton Waterproofing Up for Impressive Eight Awards
Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, has made the finals in an impressive eight award categories in the past month, at the same time as celebrating their 175th anniversary.
13/06/2023 - Newton shortlisted for two construction news specialists awards
Newton Waterproofing is proud to have been named as a finalist in two categories of the prestigious CN Specialists Awards.
25/05/2023 - Get Full Waterproofing Installation Protection with Newton Specialist Basement Contractors
When carrying out waterproofing installations, it’s essential that they are installed and guaranteed by trained and approved waterproofing contractors, ensuring ultimate peace of mind for the end user.
12/04/2023 - Newton Waterproofing to Host Open Day for New Leeds Distribution Centre
Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, will be hosting an open day to officially launch its new Leeds distribution centre.
24/03/2023 - Tunnel Waterproofing and Fireproofing
About Oldroyd Construction Membranes
07/03/2023 - Fire Resistant Tunnel Waterproofing System Protects the British Museum
Newton Waterproofing, the UK’s leading independent designers and suppliers of waterproofing systems, has delivered a failsafe waterproofing and fireproofing solution to the service tunnels beneath the British Museum, ensuring that the Grade 1 listed building is fully protected.
09/02/2023 - Newton Waterproofing Celebrates Milestone 175th Anniversary
At Newton Waterproofing, we’re proud to be celebrating our 175th anniversary this year, marking an incredibly impressive milestone.
12/01/2023 - Delivering injection resin products across the UK
Newton is proud to be the exclusive UK distributor for Belgian injection resin specialists TRADECC, providing our customers with high-quality injection resins for water sealing, soil consolidation, structural repair, and concrete repair.
05/12/2022 - Guaranteed Installations with Newton Specialist Contractors
We always recommend using one of our Newton Specialist Basement Contractors (NSBCs) for your waterproofing projects.
10/11/2022 - Nationwide, Next-Day Product Deliveries on Newton Vans
Thanks to the opening of the new Newton Waterproofing Systems Northern Branch in Leeds, our tracked delivery services on our fleet of Newton vehicles will also be expanding across the country.
04/10/2022 - Newton Waterproofing Opens New Distribution Centre in Leeds
Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, has opened a new distribution centre in Leeds, giving customers in the north of the UK quicker and easier access to the company’s extensive range of waterproofing products, technical services and delivery options.
25/04/2022 - Book Our New RIBA CPD on Waterproofing to British Standard 8102:2022
On March 31st, 2022, the new British Standard for waterproofing was released, providing everyone with access to the updated version of the Standard, BS 8102:2022.
22/03/2022 - Get Design Liability and Guarantees from Newton Specialist Contractors
Here at Newton, we take pride in our specialist contractors’ installations. Our network of NSBCs (Newton Specialist Basement Contractors) work closely in partnership with us to provide the highest quality products, design, and installations in all aspects of basement waterproofing.
08/03/2022 - Newton Waterproofing Continues to Drive Sustainability
Despite a year of challenges and changing circumstances, with more national lockdowns, huge increases in the cost of materials, and greater pressure on suppliers, Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, has kept sustainability at the top of its agenda.
25/02/2022 - Newton Joins EDGE London at Their Futurebuild Debut This March
The Futurebuild Conference was created as a space to connect like-minded and sustainability-conscious suppliers and specifiers, facilitating commercial partnerships that benefit both people and the planet.
14/02/2022 - The Newton Design Service Integrates with your Plan of Work
When it comes to waterproofing, there’s no room for error. Proper design and specification of waterproofing systems is vital to ensure quality and complete protection.
08/02/2022 - Newton Waterproofing receives Feefo Platinum Trusted Service Award 2022.
Newton Waterproofing is incredibly proud to have won the 2022 Feefo Platinum Trusted Service award.
31/01/2022 - Sign up for our one-day Type A & B Waterproofing Course
Newton’s expert tutors, Technical Director Richard Crossley, and Senior Technical Manager Daniel Gilmour, will provide a detailed explanation of:
14/01/2022 - Gas Protection
When it comes to the challenge of waterproofing and gas proofing a below-ground structure, Newton Waterproofing Systems, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, stock a range of products that combine effective waterproofing and gas protection.
14/01/2022 - The Newton Waterproofing App – Now on Desktop!
The free Newton Waterproofing App has undergone a major update, including moving to a Google software development kit and adding a host of new features.
08/12/2021 - Newton Waterproofing’s Promising Product Partnerships
As Newton has continually grown over the years, we have secured many new partnerships to broaden our already comprehensive range of waterproofing products.
16/11/2021 - Newton Expands the HydroBond Waterproofing System
Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, has expanded its range of HydroBond products to offer an even wider range of waterproofing solution to its nationwide customer base.
18/10/2021 - Introducing Newton Waterproofing’s New Product Catalogue
This year, Newton have produced a new product catalogue to showcase our extensive range of products for waterproofing, damp proofing, gas proofing and structural protection and repair.
22/09/2021 - Newton Waterproofing Litter Picks for World Cleanup Day
World Cleanup Day is one of the biggest global-civic movements of our time, created to tackle the world’s large-scale littering problem. Most of the waste ends up in the ocean, harming sea life and damaging the ecosystem.
02/08/2021 - Waterproofing the Warwick Court Redevelopment, London
The Project - Warwick Court, the former Goldman Sach’s headquarters on Paternoster Square in London, is being redeveloped by Mace Group after they won the £60m project in 2020.
13/07/2021 - Newton Waterproofs Listed Basement Conversion in Kensington & Chelsea
Newton Specialist Contractor Arti Structural Waterproofing are a leading expert in all forms of residential and commercial waterproofing, with a reputation for delivering high-quality waterproofing installations.
09/06/2021 - Waterproofing the Multi-Level Basement of a Luxury London Hotel
Newton is proud to contribute to the transformation of the unique, Grade I listed Cambridge House in Piccadilly as it undergoes conversion into one of London’s grandest hotels.
26/05/2021 - Register today for our next live CPD Webinar
Join us this Wednesday 9th June at 1pm for the first live webinar presentation of our newest RIBA approved, double-point CPD on ‘Principles of Type A External Waterproofing to British Standard 8102:2009’.
12/05/2021 - Newton Takes on Waterproofing Design Liability
Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, has launched a bespoke Design Service dedicated to helping architects and specifiers with a range of projects.
29/04/2021 - Register for Newton's First Type B Waterproofing Live CPD Webinar
Calling all Architects and Specifiers! Newton Technical Director Richard Crossley will be delivering our third monthly RIBA approved CPD webinar of 2021 on Wednesday 5th May at 1 pm!
13/04/2021 - TRADECC Partnership puts Newton Waterproofing in the Lead for UK Injection Resin Projects
Newton Waterproofing, the UK’s leading independent designers and suppliers of guaranteed waterproofing systems, has become the go-to UK company for injection resins, thanks to a thriving partnership with Belgian injection resin specialists TRADECC.
07/04/2021 - Second monthly RIBA approved CPD webinar of 2021 on Thursday 8th April at 1pm.
Newton Technical Director Richard Crossley will be delivering Newton’s second monthly RIBA approved CPD webinar of 2021 on Thursday 8th April at 1pm.
15/03/2021 - Newton Latent Defects Guarantee is the Ultimate in Waterproofing Insurance
Newton Waterproofing, the UK’s leading independent designer and supplier of guaranteed structural waterproofing systems, now offers Latent Defects Insurance – and it is the only such policy available through a UK waterproofing supplier.
11/02/2021 - Newton Achieves BES 6001 Certification
Newton Waterproofing have recently become the first UK waterproofing supplier to have an entire waterproofing solution, the Newton System 500 for below-ground cavity drain waterproofing, certified to BES 6001 by BRE Global.
21/01/2021 - Newton Launches Two New Waterproofing Guarantees
Newton has just launched two new meaningful, single-point Guarantees that provide complete protection for the client, specifier and the contractor. The Newton Insurance Backed Guarantee and the Newton Latent Defects Guarantee.
03/12/2020 - Newton and Axter Partner to Combine Waterproofing Expertise
Newton Waterproofing Systems and Axter Limited are proud to announce their UK waterproofing partnership.
13/11/2020 - Newton Takes on Waterproofing Design Liability and Offers a Meaningful Insurance Backed Guarantee
After more than 170 years’ in business, Newton Waterproofing Systems remain a leading independent supplier of waterproofing systems for all below-ground structures, no matter the size.
13/10/2020 - The Newton Specification Partnership
Newton Waterproofing Systems are pleased to announce the Newton Specification Partnership (NSP), which was formed this year as a result of Newton’s desire to improve the process of designing and specifying waterproofing systems.
12/10/2020 - Newton Waterproofs the London School of Economics
In April 2016, the world-renowned London School of Economics announced that Grafton Architects were to design their next major project.
18/09/2020 - Register For Newton’s Third Live CPD Webinar
Calling all Architects and Specifiers! Following the success of Newton Waterproofing’s first and second live CPD events, Newton Technical Director Richard Crossley will be delivering our third RIBA approved CPD webinar on Wednesday 7th October at 1 pm.
16/09/2020 - Transforming the Royal College of Music, London
Newton Specialist Contractor, MacLennan, delivered a waterproofing solution to another iconic London building when they took on this project across five levels of the world-famous Royal College of Music in South Kensington, London.
17/08/2020 - Newton Waterproofing supports professional development despite Covid-19
Newton Waterproofing is continuing to support architects, engineers, surveyors, designers, and specifiers in their professional development – despite the current Covid-19 challenges.
19/07/2020 - Join Newton For A Live RIBA CPD Webinar
Calling all Architects & Specifiers! Following the success of Newton Waterproofing’s first live CPD event, Newton Technical Director Richard Crossley will be delivering our second RIBA approved CPD webinar on Wednesday 5th August at 1pm.
04/06/2020 - Calling all Architects and Specifiers!
The UK’s leading independent designer and supplier of guaranteed waterproofing solutions are hosting a live CPD webinar on Wednesday 24th June at 1pm.
18/05/2020 - Newton Becomes the UK Licensed Partner for Unique RiveStop System
Newton Waterproofing Systems has become the UK licensed partner for the unique RiveStop System in the UK waterproofing industry.
03/04/2020 - Calling all Architects and Specifiers!
Here at Newton Waterproofing Systems, we offer an online RIBA-approved CPD video that you can watch for free from your office or at home, at any time that is convenient to you.
10/03/2020 - Newton Waterproofing Becomes Exclusive UK Distributor for TRADECC Injection Resins
Newton Waterproofing, a leading independent designer and supplier of guaranteed waterproofing systems, has become the exclusive UK distributor for the injection resins of TRADECC, a Belgian construction chemicals specialist.
24/02/2020 - Large Basement Extension at Impressive Country Home
An impressive basement extension, housing a swimming pool and sauna, required a robust waterproofing solution at this large country home.
27/01/2020 - Newton Wins Feefo Gold Trusted Service Award 2020
Newton Waterproofing has won the Feefo Gold Trusted Service award, an independent seal of excellence that recognises businesses for delivering excellent customer services, as rated by real customers.
08/01/2020 - Five Tonnes of Plastic Saved from Landfill in 2019 by Award-Winning Recycling Service
An innovative and unique recycling service set up by Newton Waterproofing has saved 5.174 tonnes of plastic from going to landfill in 2019.
04/12/2019 - Six Awards in Two Years for Membrane Recycling Service
In just under two years, the incredibly unique and innovative Membrane Recycling Service has garnered plenty of attention from various prestigious award events in the UK, with a total of 11 award nominations and six wins!
28/11/2019 - Newton Waterproofing partners with global waterproofing specialist RASCOR
Newton Waterproofing has exclusively partnered with RASCOR International to bring the Switzerland-based company’s unique RASCOtank system to the UK.
18/11/2019 - Stunning Mill House Extension in Cornwall
This old Mill House in Cornwall has undergone a huge conversion and extension to become a luxurious five-bedroom home, protected by the failsafe Newton CDM System.
05/11/2019 - Another Star Newtonite Gains CSSW Qualification
Vince Tansey, Business Development Manager and new addition to the Newton family, has recently gained the highly desirable CSSW qualification from the leading training provider in the UK, the Property Care Association (PCA).
05/11/2019 - Luxury New Hillside Home, North London
Waterproofing an impressive glass-fronted hillside house
24/10/2019 - Newton's Recycling Service Wins a Fifth Prestigious Award
Newton Waterproofing are thrilled to have won the Charles Darwin Award at The British and Irish Trading Alliance (BITA) awards in recognition of our unique membrane recycling service. This prestigious award makes the fifth accolade won by the scheme in just two years.
27/09/2019 - Luxury Basement Extension, South London
Considering the large size of the basement area and its proximity to the River Thames, Newton Specialist Contractor Stonehouse were called in to provide a complete waterproofing system for the structure.
19/09/2019 - Damp Proofing the Iconic Tower Bridge, London
Newton Specialist Contractors ASF Waterproofing were called in to investigate why the Bridge Master’s Quarters at No.1 Tower Bridge was suffering from damp and proceeded to install multiple Newton products to resolve the issue.
13/09/2019 - Two More Award Nominations For The Newton Membrane Recycling Scheme
Continuing our streak of award nominations so far in 2019, Newton are honoured to be shortlisted at both the BITA Gala Award Ceremony and the London Construction Awards, for the Charles Darwin Award and Sustainable Construction Award respectively.
20/08/2019 - ‘Newton Waterproofing CSSW Training Course & Exam’
Newton Waterproofing Systems have seen great success with our comprehensive training schemes offered to our Specialist Basement Contractors.
08/08/2019 - Listed Vault Waterproofing in Central London
Beneath the streets of Central London lies a network of Grade II Listed underground vaults. As Newton Specialist Contractors, Stonehouse were called in to waterproof four of these impressive structures and turn them into a completely dry commercial space.
09/07/2019 - Concrete Waterproofing Explained
Reinforced concrete, when designed and installed correctly, is already waterproof. Good concrete waterproofing design therefore focuses on the gaps in the structure. Here is how to protect a structure from leaks.
18/06/2019 - Newton’s Unique Recycling Service Wins Big at The National Building Awards
Last week, Newton Waterproofing Systems took home the prestigious Innovation of the Year accolade from the National Building Awards!
13/05/2019 - Newton Injection Resins Added To Structural & Concrete Repair Range
Newton’s product portfolio is expanding once again to include a comprehensive range of injection resins, suitable for the remedial repair of cracks in concrete that can lead to water ingress.
10/04/2019 - Newton Waterproofing Wins Business Of The Year 2019
Following on from 2018’s impressive award wins, Newton Waterproofing are honoured to have been awarded ‘Business of the Year 2019’ at the Kent Chamber Business Awards!
26/03/2019 - Newton Waterproofing Adds BBA Certified Damp Proof Membrane To Product Portfolio.
Newton 802-DPM is the newest addition to Newton Waterproofing System’s comprehensive range of damp proofing and waterproofing products.
11/03/2019 - Two More Newton Waterproofing Products Achieve Third-Party Agrément® approvals.
Newton’s name in the UK is synonymous with the highest levels of product quality and technical service, and this has now been bolstered by two more Newton products achieving NHBC, BBA and BDA Agrément® approvals.
10/07/2018 - Vote for Newton – We’ve been shortlisted for Best Construction Supplier to Work With 2018
We have made it through to the public vote stage of the 2018 Construction Enquirer Awards, the awards are dedicated to recognising and rewarding the industry’s best companies to work for and the best firms to do business with, and as such Newton have been shortlisted in the ‘Best Construction Supplier to Work With’ category.
10/07/2018 - Newton Proud Double Award Winners
Following a record number of entries in this year’s Kent Excellence in Business Awards, we were one of only two companies to win two awards, taking home Medium Business of the Year and the Commitment to the Environment award.
07/06/2018 - Remediating a Basement Disaster
The Project A young couple building their dream first home - and filmed by Channel 4’s Grand Designs - fell foul of rogue contractors when their site became a basement disaster.
07/06/2018 - Waterproofing Repairs to Historic Listed Vaults, London
The Project As part of their ongoing relationship with the Imperial College London, Newton Specialist Contractor A.P. Gooch was tasked with assessing and waterproofing 11 historic Victorian brick vaults beneath London’s streets, after the existing competitor ‘waterproof render’ had failed.