Water tanks deteriorate over time and GRP lining is the best solution for repairing water tank
linings. Glass reinforced plastic (GRP) or fiberglass lining has been used extensively for
repairing tanks used for both the storage of drinking water and chemicals. Water tanks can suffer
from an number of problems like;
● Leaking through failed lining
● Osmosis – liquids permeating through the tank and polluting water.
● The difference in surface condition
● Thinning of the surface material.
● Colored spots
All of these above-mentioned problems can be resolved by the application of GRP lining. The
application of GRP lining should be done properly to achieve long lasting results. Accurate
surface preparation is necessary in case of GRP lining steel and concrete tanks. Intensive forms
of surface preparation such as abrasive blasting and high pressure water jetting are not applicable
because they may damage the tank structure. Delicate surface preparation methods like sanding
or sponge blasting are done which offers advantages like dust free working without harming the
All bolts and fixings are checked for tightness as per the tank manufacturers before starting the
GRP lining procedure.This is done to ensure that the leakage is not a result of loose nuts and
bolts. It is important to consider the inherent movement inside tank structures before selecting
the right lining material. GRP linings are preferred in water tank linings because they are rigid
and they do not move with the tank structure. This helps to prevent cracking and splitting of
water tanks. Spark test is not possible for GRP lining due to its insulation properties. So proper
visual examination is conducted after GRP lining.
Selection of the right materials for GRP lining in different environments.
Resin technology has developed over the years and fiberglass manufacturers have long years of
available data. They have identified the best suited resin for different types of environments with
the help of scientific data. The Resin systems can achieve different maximum operating
temperatures, and accurate selection of the resin system helps GRP lining to provide resistance
against a wide range of temperatures.
Water tanks may suffer from severe coating failure due to poor adhesion from the epoxy to an
unprepared substrate. Sometimes the tanks may be located in a sensitive location like a
laboratory. In such cases you definitely need experienced hands like that of Al-Harth Fiberglass.
We have three decades of experience in the field and have successfully. dealt with several types
of sensitive cases. We complete the GRP lining procedure safely and efficiently, managing the
odor during the GRP lining process. We keep the area clean and finish our work without
hampering the client’s valuable work time.