GacoFlex A4271 Bleed Trap™ Base Coat Primer - 18.9 Ltr

£572.00 (inc VAT)

£476.67

(ex VAT)

£572.00

Product variants

Delivery:

IN STOCK. Next Day Delivery (if ordered before 13:00)

Key Features:

Size: 18.9 Ltr
Colour: Red
Material: Acrylic Bleed-Blocking Base Coat / Primer
Formula: Single-component, water-based
Coverage: Approx 46 m² per 18.9L container
Easy Application: Apply using a brush or roller
Solvent Free: Yes
Use: Specifically developed to prevent oil and bitumen bleed-through when applying silicone roof coatings over asphalt, roofing felt and bituminous roofing membranes
Warranty: System warranties available up to 20 years

Description:

GacoFlex A4271 Bleed Trap™ Base Coat Primer is a professional-grade, water-based acrylic primer specifically developed to prevent oil and bitumen bleed-through when applying silicone roof coatings over asphalt, roofing felt and bituminous roofing membranes.

Designed for use with GacoFlex S42 100% Silicone Roof Coating, this specialist bleed-blocking primer encapsulates oils naturally present within bituminous roofing materials, helping prevent them from migrating into the finished silicone coating and causing unwanted brown staining or discolouration.

Ideal for flat roof refurbishment, commercial roofing, industrial roof waterproofing and existing felt roof restoration, GacoFlex A4271 creates a protective barrier between the original roof covering and the new waterproof coating. This helps preserve the appearance, colour consistency and reflective properties of the finished roofing system.

Its single-component, water-based formulation is easy to apply using a brush, roller or airless sprayer, making it a practical solution for both professional roofing contractors and experienced installers.

GacoFlex A4271 is particularly recommended when waterproofing roofs constructed from SBS-modified bitumen, APP-modified bitumen, built-up roofing (BUR), asphalt and mineral-surfaced roofing membranes. It is a required component for eligible Gaco warranted roofing systems over SBS-modified bitumen.

Once fully dry, GacoFlex S42 Silicone Roof Coating can typically be applied directly over A4271 without the need for an additional primer, subject to satisfactory adhesion testing and manufacturer specifications.

Prevents Bitumen Bleed-Through: Encapsulates oils within asphalt and bituminous roofing materials to help prevent brown staining through silicone coatings.
Designed for Gaco S42 Silicone Coatings: Provides a compatible base for GacoFlex S42 100% Silicone Roof Coating.
Ideal for Felt & Asphalt Roofs: Suitable for a wide range of bituminous roofing membranes, including SBS, APP and built-up roofing systems.
Protects Roof Coating Appearance: Helps maintain the original colour and reflective appearance of the finished silicone waterproofing system.
Water-Based Acrylic Formula: Single-component, low-VOC formulation that's easy to mix, apply and clean up.
Quick Drying: Can be ready for overcoating after a minimum of 4 hours under suitable conditions.
Easy Application: Suitable for brush, roller or airless spray application.
Professional Roofing System Component: Required for Gaco warranted installations over SBS-modified bitumen roofing.

What Can GacoFlex A4271 Bleed Trap™ Base Coat Primer Be Used For?

GacoFlex A4271 Bleed Trap Primer is suitable for preparing a variety of existing roofing surfaces before applying compatible Gaco silicone waterproof coatings, including: