Epoxy grout is a highly durable form of grout used for filling in the gaps between tiles. Unlike traditional cement-based grout, epoxy grout is made from two components: resin and hardener that, when mixed, create a waterproof and stain-resistant bond. Its robust nature makes it ideal for areas with high traffic or exposure to moisture, such as kitchens and bathrooms. Epoxy grout does not require sealing due to its non-porous nature, which makes it less susceptible to staining and cracking over time. Although it may be more challenging to apply and has a higher initial cost than cement-based grouts, its longevity and reduced maintenance requirements can make it a cost-effective choice in the long run.

Polyvinyl chloride (PVC) is a widely used thermoplastic polymer known for its versatility and durability. Its chemical resistance is one of its key properties, but when it comes to resistance to petrol, the situation is nuanced. PVC generally offers good resistance to many solvents, oils, and fuels, but prolonged exposure to petrol can cause degradation, particularly if the petrol contains additives like ethanol. Pure hydrocarbon-based petrol may not affect PVC as severely, but over time, the plasticizer components in PVC can leach out, leading to brittleness and potential failure. For applications where exposure to petrol is unavoidable, alternatives like polyurethane (PU) or nitrile rubber (NBR) might be more suitable due to their superior fuel resistance. However, for short-term or intermittent contact, PVC can still be a viable option.

CPVC glue, specifically formulated for CPVC (Chlorinated Polyvinyl Chloride) pipes, can indeed be used on PVC (Polyvinyl Chloride) pipes, but with some limitations. Both CPVC and PVC are types of plastic pipe used commonly in plumbing. The chemical composition of CPVC glue allows for a strong bond with PVC due to similar chemical properties. However, for optimal results and to adhere to plumbing codes, it is recommended to use the appropriate glue for each type of pipe. This means using CPVC glue for CPVC pipes and PVC glue for PVC pipes. Using CPVC glue on PVC might work for temporary fixes or non-critical applications, but for long-term durability and compliance with plumbing standards, using the specific glue designed for the specific type of pipe is advisable.