Tag Archives: ReadySeal

ReadySeal surface primer tin

ReadySeal Surface Primer

ReadySeal Surface Primer is a specially formulated low viscosity fast drying primer engineered to facilitate overlap joints on partially cured ReadySeal Liquid Applied Waterproofing Membrane. It is also used for full priming of cured ReadySeal prior to repairing any damage or applying a surface finish. 

Only required if the existing ReadySeal has been installed and allowed to cure for more than 9 hours, and needs to be overcoated. 

For a comprehensive NBS J31 specification contact Radmat Building Products.

BBA Certification No. 20/5797 

For Overlap preparation
• Use outdoors or in a well-ventilated area. 

• Ensure the surface of the ReadySeal is clean, dry and free from residues, dust, grease, dirt, moss etc. 

• Wipe an area a minimum of 100mm wide with ReadySeal Pre-Wipe in accordance with the instructions provided. Allow to evaporate. 

• Apply an even coat of ReadySeal Surface Primer using a brush or roller apply at a rate of 12.5g per linear metre, covering a 100 mm wide strip measured from the edge of the existing ReadySeal Liquid Applied Waterproofing Membrane. 

• Allow to dry for a few minutes until the surface is tacky. 

• Once tacky immediately apply the next layer of ReadySeal, covering the entire width of the primed area, and continue installing the ReadySeal in accordance with the specification. 

• Overcoating with ReadySeal must take place within 30 minutes to stop dust pick up on tacky surface. 

• Do not prime an area greater than can be covered within 30 minutes. 

For Overcoating
• Follow the instruction as above, using a coverage rate of 1000g per 8 m2. 

• Do not apply if rain is expected within 6 hours. 

• Do not apply during rain or frost and when surface air temperature is <5ºc. 

• The surface must be clean and dry to touch. 

Up to 14m² per litre depending method of application. 


ReadySeal 2 part component blocker Primer

ReadySeal Blocker Primer

ReadySeal Blocker Primer is a two-component primer that creates a barrier preventing bitumen oils from bleeding through into ReadySeal Liquid Applied Waterproofing Membrane, preventing discolouration and adhesion loss when overlaying new or old bitumen membranes.

ReadySeal Blocker Primer is also suitable for use as a primer for new or old PVC Single Ply Membranes, dry and partially cured concrete, steel, aluminium and lead.

Designed as a two-coat application when used as a bitumen blocker. All other applications may be suitable for single coat application depending on condition.

• To prevent bleed the bleed through of the oils in Reinforced bitumen Membranes/Bitumen coatings. 

• To create a key when overlaying PVC Single Ply Membranes

• To create a key to steel, aluminum and lead.

• To eliminate the risk of pin holing in ReadySeal when applying over damp concrete.

BBA Certification No. 20/5797.

Always test the primer and top coat fully before proceeding. If the test results are satisfactory proceed to apply to the whole area.

Ensure the surface is clean, dry and free from any contaminants including dust, dirt, oil, grease, algae and efflorescence. The product is moisture tolerant when used on concrete. 

Add part ‘B’ to Part ‘A’ using a jiffy mixer blade attached to a slow running electric drill. DO NOT mix by hand as this can lead to areas of uncured material. Once mixed the product MUST be used within 40 – 50 minutes @ 20ºC.

Transfer mixed product to a roller tray and apply evenly to the surface using a medium-pile simulated sheepskin roller. brush or squeegee. Apply at a rate of approximately 4m² / kg (at 200 microns thickness coating weight coverage will vary according to the texture, porosity and evenness of the surface). 

When used as a Bitumen Blocker/Primer
Allow the first coat to cure for a period of 12 hours before applying a second coat. Allow the second coat to cure for a period of 12 hours before applying the ReadySeal Liquid Applied Waterproofing Membrane. Two coats must be applied to ensure the performance stated is met.

When used in all other stated applications
Allow the first coat to cure for a period of 12 hours before applying the ReadySeal.

ReadySeal Blocker Primer MUST be overlaid no later than 24 hours after application and should not be applied below 5ºC.

Cleaning of Equipment:
Remove as much product as possible before cleaning. Clean tools and equipment immediately after use with suitable solvents such as Acetone, Thinners etc.

Liquid Applied Membrane


ReadySeal is a BBA Certified one component silane-terminated polyether Liquid Applied Waterproofing Membrane. Suitable for use as a roof waterproofing membrane on warm, cold, inverted and green roofs in flat roof, pitched roof, roof terrace, podium deck, balcony* and walkway* applications including protected zero fall specifications. When used as part of a roof system classified under BS EN 13501-5 ReadySeal achieves Broof(t4), contact Radmat Building Products for certification information and build-ups. Plasticiser, cyanate, and solvent free, ReadySeal has a BBA assessed service life of in excess of 30 years.

For a comprehensive NBS J31 specification contact Radmat Building Products.

*including enclosed balconies over heated space, insulated walkways and specified attachments such as projecting open balconies, projecting enclosed balconies, recessed open balconies or recessed enclosed balconies.

BBA Certification No. 20/5797

• One component without mixing
• Plasticiser free
• Cyanate free

• New Build and Refurbishment applications
• Inverted roof specification on flat and zero fall roofs with limited access or pedestrian access
• Protected warm and cold roof specifications e.g. covered by pavers or other suitable protection on flat and zero fall roofs with limited or pedestrian access
• Green roof specifications (extensive) on pitched, flat and zero fall roofs with limited access
• Exposed warm and cold roof specifications on flat and pitched roofs with limited access
• Roof terraces
• Podium decks
• Protected enclosed balconies over heated space
• Protected Insulated walkways
• Protected Specified Attachments such as projecting open balconies, projecting enclosed balconies, recessed open balconies or recessed enclosed balconies
• As an overlay waterproofing to existing asphalt and bitumen felt roofs (may require priming)
• As the primary waterproofing membrane or to upgrade roof gutters, metal or fibre cement sheeting and cement particle panels

See Product Data sheet for detailed information.